Supreme Skylights, 2069 9th Ave, Ronkonkoma, NY 11779, US

Founded in 1982, Kelly Window Systems is a family-owned and operated company that manufactures windows and doors for the commercial and residential markets. The company offers double-hung, sliding and fixed windows in several specifications. It provides casement, awning, hopper and picture windows in various configurations. Kelly Window Systems has the VANGUARD series of windows and doors available for its customers. The company s WELWIN series of products offers bay, bow and garden windows and entry and patio doors in many finishes. It also sells a range of glass units and terrace and sliding glass doors. Kelly Window Systems specializes in installation and delivery services. The company is located in Farmingdale, N.Y.